:root {
    /* Formal Administrative Dark Theme */
    --primary: #3b82f6;
    /* Lighter blue for visibility on dark */
    --primary-dark: #1e40af;
    --bg-main: #020617;
    /* Slate-950 */
    --bg-sidebar: #0f172a;
    /* Slate-900 */
    --bg-card: #1e293b;
    /* Slate-800 */
    --border: #334155;
    /* Slate-700 */
    --text-main: #f1f5f9;
    /* Slate-100 */
    --text-muted: #94a3b8;
    /* Slate-400 */
    --status-transit: #60a5fa;
    --status-approaching: #4ade80;
    --status-stalled: #f87171;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

/* Header Refinement - Dark Mode */
header {
    background-color: var(--bg-sidebar);
    border-bottom: 2px solid var(--primary-dark);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* Sidebar Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

/* Van Cards - Formal Dark Style */
.van-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
}

.van-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    background: #273549;
    /* Slightly lighter on hover */
}

.van-card.selected {
    border-color: var(--primary);
    background-color: #1e293b;
    box-shadow: inset 0 0 0 1px var(--primary), 0 0 20px rgba(59, 130, 246, 0.1);
}

/* Map Adjustments - Dark Mode Filter */
#map {
    background: #020617;
}

.leaflet-tile-pane {
    filter: invert(100%) hue-rotate(180deg) brightness(95%) contrast(85%);
}

/* Mobile Adjustments */
[x-cloak] {
    display: none !important;
}

@media (max-width: 768px) {
    .van-card {
        padding: 0.75rem;
    }

    .status-badge {
        font-size: 7px;
        padding: 1.5px 6px;
    }

    .tour-modal {
        width: 90%;
        margin: 0 auto;
    }

    header h1 {
        letter-spacing: 0.05em;
    }
}

/* Custom transitions for sidebar */
#sidebar-feed {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.van-marker svg {
    color: var(--primary);
    width: 28px;
    height: 28px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5));
}

.terminal-marker-container div {
    border-color: var(--bg-main) !important;
}

/* Formal Status Badges */
.status-badge {
    text-transform: uppercase;
    font-size: 8px;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

/* Instruction Modal (Standard Dark Modal) */
.tour-modal {
    background: var(--bg-sidebar);
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    color: var(--text-main);
}

.van-marker {
    transition: transform 0.3s ease-out;
}

/* Tour Pulse Highlight */
@keyframes markerPulse {
    0% {
        filter: drop-shadow(0 0 5px rgba(59, 130, 246, 0.5));
        transform: scale(1);
    }

    50% {
        filter: drop-shadow(0 0 20px rgba(59, 130, 246, 1));
        transform: scale(1.5);
    }

    100% {
        filter: drop-shadow(0 0 5px rgba(59, 130, 246, 0.5));
        transform: scale(1);
    }
}

.pulse-highlight svg {
    animation: markerPulse 1.5s infinite ease-in-out;
    color: #60a5fa !important;
}